[plug] 2.5 USB Enclosure

[Daniel Pearson]

Time to get a new power supply :P

Chris Caston wrote:

>On Sat, 2005-08-06 at 01:31, Craig Ringer wrote:
>  
>
>>On Fri, 2005-08-05 at 21:32 +0800, Chris Caston wrote:
>>
>>    
>>
>>>OK I had trouble with 10gb drives but not with 40gb and above.
>>>      
>>>
>>It's entirely possible that the issues you encountered were to do with
>>power draw. Did you check the power requirements of the drives? IIRC USB
>>guarantees 500 milliamps (certainly < 1 amp) at 5V. Some host controller
>>implementations provide a *LOT* more than that when required, some stick
>>close to the standard. Laptops seem to be stricter about max power draw,
>>especially Intel-chipset laptops.
>>
>>I've also found that all other things being equal, newer hardware tends
>>to be willing to supply more power. In particular, lots of manufacturers
>>seem to support much greater draws in USB2 chipsets, even though the
>>standard didn't increase the max permitted power draw for USB2 (AFAIK).
>>
>>--
>>Craig Ringer
>>    
>>
>
>I had a customer with a USB hub that would suck most of the power out of
>the machine sometimes killing the PSU other times making it unable to
>start.
>
>
>  
>
>>_______________________________________________
>>PLUG discussion list: plug at plug.org.au
>>http://www.plug.org.au/mailman/listinfo/plug
>>Committee e-mail: committee at plug.linux.org.au
>>
>>    
>>
>
>_______________________________________________
>PLUG discussion list: plug at plug.org.au
>http://www.plug.org.au/mailman/listinfo/plug
>Committee e-mail: committee at plug.linux.org.au
>
>
>
>  
>

-- 
*Daniel Pearson
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